| Message ID | 1630400200-2522-1-git-send-email-mdalam@codeaurora.org |
|---|---|
| State | Changes Requested |
| Headers | show |
| Series | [V2] mtd: rawnand: qcom: Update code word value for raw read | expand |
Hi Md, Md Sadre Alam <mdalam@codeaurora.org> wrote on Tue, 31 Aug 2021 14:26:40 +0530: > From QPIC V2 onwards there is a separate register to read > last code word "QPIC_NAND_READ_LOCATION_LAST_CW_n". > > qcom_nandc_read_cw_raw() is used to read only one code word > at a time. If we will configure number of code words to 1 in > in QPIC_NAND_DEV0_CFG0 register then QPIC controller thinks > its reading the last code word, since from QPIC V2 onwards > we are having separate register to read the last code word, > we have to configure "QPIC_NAND_READ_LOCATION_LAST_CW_n" > register to fetch data from controller buffer to system > memory. > > Cc: stable@kernel.org You miss the Fixes tag which is certainly the most important. > Signed-off-by: Md Sadre Alam <mdalam@codeaurora.org> > > [V2] > * Added stable tags The changelog should not be part of the commit message. You should put it... > --- ...here. > drivers/mtd/nand/raw/qcom_nandc.c | 8 ++++++-- > 1 file changed, 6 insertions(+), 2 deletions(-) > > diff --git a/drivers/mtd/nand/raw/qcom_nandc.c b/drivers/mtd/nand/raw/qcom_nandc.c > index ef0bade..04e6f7b 100644 > --- a/drivers/mtd/nand/raw/qcom_nandc.c > +++ b/drivers/mtd/nand/raw/qcom_nandc.c > @@ -1676,13 +1676,17 @@ qcom_nandc_read_cw_raw(struct mtd_info *mtd, struct nand_chip *chip, > struct nand_ecc_ctrl *ecc = &chip->ecc; > int data_size1, data_size2, oob_size1, oob_size2; > int ret, reg_off = FLASH_BUF_ACC, read_loc = 0; > + int raw_cw = cw; > > nand_read_page_op(chip, page, 0, NULL, 0); > host->use_ecc = false; > > + if (nandc->props->qpic_v2) > + raw_cw = ecc->steps - 1; > + > clear_bam_transaction(nandc); > set_address(host, host->cw_size * cw, page); > - update_rw_regs(host, 1, true, cw); > + update_rw_regs(host, 1, true, raw_cw); > config_nand_page_read(chip); > > data_size1 = mtd->writesize - host->cw_size * (ecc->steps - 1); > @@ -1711,7 +1715,7 @@ qcom_nandc_read_cw_raw(struct mtd_info *mtd, struct nand_chip *chip, > nandc_set_read_loc(chip, cw, 3, read_loc, oob_size2, 1); > } > > - config_nand_cw_read(chip, false, cw); > + config_nand_cw_read(chip, false, raw_cw); > > read_data_dma(nandc, reg_off, data_buf, data_size1, 0); > reg_off += data_size1; Thanks, Miquèl
On 2021-08-31 17:12, Miquel Raynal wrote: > Hi Md, > > Md Sadre Alam <mdalam@codeaurora.org> wrote on Tue, 31 Aug 2021 > 14:26:40 +0530: > >> From QPIC V2 onwards there is a separate register to read >> last code word "QPIC_NAND_READ_LOCATION_LAST_CW_n". >> >> qcom_nandc_read_cw_raw() is used to read only one code word >> at a time. If we will configure number of code words to 1 in >> in QPIC_NAND_DEV0_CFG0 register then QPIC controller thinks >> its reading the last code word, since from QPIC V2 onwards >> we are having separate register to read the last code word, >> we have to configure "QPIC_NAND_READ_LOCATION_LAST_CW_n" >> register to fetch data from controller buffer to system >> memory. >> >> Cc: stable@kernel.org > > You miss the Fixes tag which is certainly the most important. Updated in V3 patch. > >> Signed-off-by: Md Sadre Alam <mdalam@codeaurora.org> >> >> [V2] >> * Added stable tags > > The changelog should not be part of the commit message. > You should put it... > Updated in V3 patch. >> --- > > ...here. > >> drivers/mtd/nand/raw/qcom_nandc.c | 8 ++++++-- >> 1 file changed, 6 insertions(+), 2 deletions(-) >> >> diff --git a/drivers/mtd/nand/raw/qcom_nandc.c >> b/drivers/mtd/nand/raw/qcom_nandc.c >> index ef0bade..04e6f7b 100644 >> --- a/drivers/mtd/nand/raw/qcom_nandc.c >> +++ b/drivers/mtd/nand/raw/qcom_nandc.c >> @@ -1676,13 +1676,17 @@ qcom_nandc_read_cw_raw(struct mtd_info *mtd, >> struct nand_chip *chip, >> struct nand_ecc_ctrl *ecc = &chip->ecc; >> int data_size1, data_size2, oob_size1, oob_size2; >> int ret, reg_off = FLASH_BUF_ACC, read_loc = 0; >> + int raw_cw = cw; >> >> nand_read_page_op(chip, page, 0, NULL, 0); >> host->use_ecc = false; >> >> + if (nandc->props->qpic_v2) >> + raw_cw = ecc->steps - 1; >> + >> clear_bam_transaction(nandc); >> set_address(host, host->cw_size * cw, page); >> - update_rw_regs(host, 1, true, cw); >> + update_rw_regs(host, 1, true, raw_cw); >> config_nand_page_read(chip); >> >> data_size1 = mtd->writesize - host->cw_size * (ecc->steps - 1); >> @@ -1711,7 +1715,7 @@ qcom_nandc_read_cw_raw(struct mtd_info *mtd, >> struct nand_chip *chip, >> nandc_set_read_loc(chip, cw, 3, read_loc, oob_size2, 1); >> } >> >> - config_nand_cw_read(chip, false, cw); >> + config_nand_cw_read(chip, false, raw_cw); >> >> read_data_dma(nandc, reg_off, data_buf, data_size1, 0); >> reg_off += data_size1; > > Thanks, > Miquèl
diff --git a/drivers/mtd/nand/raw/qcom_nandc.c b/drivers/mtd/nand/raw/qcom_nandc.c index ef0bade..04e6f7b 100644 --- a/drivers/mtd/nand/raw/qcom_nandc.c +++ b/drivers/mtd/nand/raw/qcom_nandc.c @@ -1676,13 +1676,17 @@ qcom_nandc_read_cw_raw(struct mtd_info *mtd, struct nand_chip *chip, struct nand_ecc_ctrl *ecc = &chip->ecc; int data_size1, data_size2, oob_size1, oob_size2; int ret, reg_off = FLASH_BUF_ACC, read_loc = 0; + int raw_cw = cw; nand_read_page_op(chip, page, 0, NULL, 0); host->use_ecc = false; + if (nandc->props->qpic_v2) + raw_cw = ecc->steps - 1; + clear_bam_transaction(nandc); set_address(host, host->cw_size * cw, page); - update_rw_regs(host, 1, true, cw); + update_rw_regs(host, 1, true, raw_cw); config_nand_page_read(chip); data_size1 = mtd->writesize - host->cw_size * (ecc->steps - 1); @@ -1711,7 +1715,7 @@ qcom_nandc_read_cw_raw(struct mtd_info *mtd, struct nand_chip *chip, nandc_set_read_loc(chip, cw, 3, read_loc, oob_size2, 1); } - config_nand_cw_read(chip, false, cw); + config_nand_cw_read(chip, false, raw_cw); read_data_dma(nandc, reg_off, data_buf, data_size1, 0); reg_off += data_size1;
From QPIC V2 onwards there is a separate register to read last code word "QPIC_NAND_READ_LOCATION_LAST_CW_n". qcom_nandc_read_cw_raw() is used to read only one code word at a time. If we will configure number of code words to 1 in in QPIC_NAND_DEV0_CFG0 register then QPIC controller thinks its reading the last code word, since from QPIC V2 onwards we are having separate register to read the last code word, we have to configure "QPIC_NAND_READ_LOCATION_LAST_CW_n" register to fetch data from controller buffer to system memory. Cc: stable@kernel.org Signed-off-by: Md Sadre Alam <mdalam@codeaurora.org> [V2] * Added stable tags --- drivers/mtd/nand/raw/qcom_nandc.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)